Machine for the manufacture of wood pulp



(No Model.) 2 Sheets-Sheet I.

G. H. POND.

MACHINE FOR THE MANUFACTURE OF WOOD PULP.

No. 351,067. Patented Oct. 19, 1886.

Fig.2.

Fla, 4;.

WITNESSES: llVl/E/VTOH (No Model.) 2 Sheets-Sheet 2.

G. H. POND.

MACHINE FOR THE MANUFACTURE OF WOOD PULP.

No. 351,067. Patented Oct. 19, 1886.

Fla. 5.

WITNESSES VE/VTOH UNITED STATES GOLDSBURY HABDEN POND, OF RUTLAND, VERMONT.

MACHINE FOR THE MANUFACTURE OF WOOD PULP.

SPECIFICATION forming part of Letters Patent No. 351,067, dated October 19, 1886. Application filed Deccmher ll, 1885. Serial No. 185,541. (No model.)

To all whom it may concern:

Be it known that I. GOLDSBURY HARDEN POND, a citizen of the United States, residing at Rutland, in the county of Rutland, State of Vermont, have invented certain new and useful Improvements in the Manufacture of Food Pulp; and I hereby declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same.

Heretofore the manufacture of pulp from wood has been done in iron cylinders or other vessels of iron, or iron vessels lined with lead in which more or less of the iron surface would be exposed to the action of the chemicals. The

surface of the iron in contact with the chcmicals in which the wood is treated discolors and stains the fibers of the wood, making the pulp of less value. The lead is so soft that a lining made out of it will not last but a few weeks and is liable to damage by the least wear. The iron surfaces cause a loss of the chemicals by decomposition, thereby enlarging the expense of manufacture.

My invention relates, primarily, to the manufacture of pulp from wood with chemicals, wherein great trouble and large expense have been heretofore met with in obtaining cylinders or vessels to hold the wood and chemicals while being treated under pressure of steam or otherwise without damage and partial decomposition ofboth the vessel and its contents; but it may be applied to advantage to other chemical machinery and apparatus, and to handling and transporting acids and chemicals and liquids containing them.

The object of my invention is to produce a bronze from which can be made a lining to the various machines in which wood is treated chemically for the manufacture of pulp, and from which the cylinders or other vessels can be wholly or in part made, which has the property of resisting all actions of the chemicals, whether hot or cold, or whether in a gaseous or aliquid condition; also, to produce a bronze that is strong and durable, capable of resisting a large amount of wear, that is hard and malleable, and not susceptible to any chemical ac tion by the chemicals used in the manufacture of pulp from wood or other material, or from sulphuric acid or any of its compounds; also, to prevent any staining or discoloration of the fibers of the wood, as is usually the case in the manufacture of pulp with chemicals in iron vessels; also, to prevent any loss of chemicals by decomposition, such as occurs in all iron vessels when used for treating wood with chemicals in the manufacture of pulp.

To carry myinvention into effect, I take the roller pulp machine,as illustrated in the drawings, making a part of this specification, in which- Figure 1, Sheet 1, is a sectional view of the shell of the machine, showing the lining of bronze at B, the bronze rollers B", and the bronze runners B and the shaft covered with a bronze casing, B. Fig. 2 is a section of the bronze roller. Fig. 3 is an elevation of the bronze roller. Fig. 4 is a sectional view of bronze pin which holds the rollers in place on the runners and against the shell, as illustrated at B. Fig. 1, Sheet 2, is a perspective viewof a roll of a sheet of bronze metal rolled outthin for linings, cans, &c. Fig. 2 is a sec ionalview of a can for canning acids and other liquid chemicals. Fig. 3 is a sectional View of a tank lined with sheet-bronze, as shown at B. Fig. 4 is a view of a measure made of sheet-bronze for measuring acids and other liquid chemicals. Fig. 5 is aview of a stop-cock of bronze for stopping off acids and other liquid chemicals. Fig. 6 is a section of tubing of bronze for conducting pipes and tubes for conveying acids or other liquid chemicals, shown at Fig. 1, and casting a lining of bronze made of the following combination of metals: copper, one hundred pounds; lead, thirty-three and onethird pounds; tin, ten pounds, and antimony, four pounds, melting them together, and mixing them well together after they are melted. After this bronze lining is cast and fitted to the inside of a machine or digester and smoothed on the inside, especiallyin the roller pulp-machine, it is ready for work and forms the bed for the roller B, Sheet 1, to roll on. These rollers and theirhangings are made of the same combination of metals. This combination may be varied a little with either metal; but I prefer the proportions hereinbefore named to all others. This combination makes a bronze of great strength and durability, capable of re- .the loss of chemicals by decomposition, and

the consequent deterioration of the pulp.

From the great strength and malleability of this bronze all the vessels for the use of the manufactory can be made of it,and can be used with perfect security without the danger of breaking, as With glass or earthen Ware. It can be used-with great economy in the transportation of liquid chemicals for the mauu'fac-' ture of pulp and other material, especially acids, which can becanned, thereby avoiding any loss in breaking and all expensive packages, and for the various manufacturers who have to use chemical processes to produce their goods it will be found invaluable from'its convenience and durability.

By the old method of lining the machines and cylinders forthe manufacture of Wood pulp .or the chemical process for paper or other material with lead alone, there was no durable property to the lining, the metal being so soft and unreliable that a large per cent. of the stock was damaged by the perforation or tear-. ing away of the lead from the machine, causing constant care and great cost in repair.

Having fully described my invention, what I claim is- 1. In the manufacture of wood pulp orother material, the lining of the rollerpulp-machine, the digesters and other vessels made wholly or in part with a combinat on of metals composed of one hundred pounds copper, thirty-three and one-third pounds lead, ten pounds tin,and fourpounds of antimony,melted and mixed together, formingabronze, forthe purposes substantially as herein set forth and described.

2. In the manufacture of pulp from wood or other material, the rollers of the roller pulpmachine and theirhangings, and other partsof the internal arrangement ofdigesters of wood for pulp or other machines or vessels made Wholly or in part of a combination of metals composed ofcopper, onehundred pounds; lead, thirty-three and one-third pounds; tin, ten pounds, and antimony, four pounds, melted and mixed together, forming a bronze, for the purposesubstantially as set forth.

3. In the process of manufacturing wood pulp or other material, the tanks and stopcooks, tubes, measures. cans, and apparatus made either wholly or in part of a combination of metals composed of copper, lead, tin, and antimony, melted and mixed together to hold, handle, convey, measure, and transport acid or other chemicals in, as herein described.

H. M. POND, A. NELsoN. 

